AITA is one of best Training Networking Institute not only in Kolkata as well as in East India.
I took Cisco and Palo Alto trainings from there and Lab infrastructure is excellent and builded with all latest products & lots of facilities for hands-on experience.
From my personal experience, if you want to learn and to do something in life, visit AITA.
AITA provide best in class traings (Cisco, Juniper, Check Point, Palo Alto, F5, Cloud- AWS etc) by all expert and industry experienced trainers.
I would like to tell one thing, still Kolkata got such institute like AITA because of one person who is my Sir Mr. Rupnath Palit, who is the founder and as well as mentor for all students, you might find other traings institute but surely will miss mentoring of networking grand father which is most required in Industry.